<html>
	<head>
		<title>xxx</title>
	</head>
	<body>
		<form method="post" action="demo.php">
		    <label for="like">喜欢：</label>
		    <select>
		        <optgroup label="国产">
		            <option value="奇瑞">奇瑞</option>
		            <option value="大众">大众</option>
		            <option value="现代">现代</option>
		            <option value="哈弗">哈弗</option>
		            <option value="比亚迪">比亚迪</option>
		        </optgroup>
		        <optgroup label="进口">
		            <option value="兰博基尼">兰博基尼</option>
		            <option value="雷克萨斯">雷克萨斯</option>
		            <option value="凯迪拉克">凯迪拉克</option>
		            <option value="玛莎拉蒂">玛莎拉蒂</option>
		            <option value="英菲尼迪">英菲尼迪</option>
		        </optgroup>
		    </select>
		</form>

		<form method="post" action="http://www.baidu.com">
		    <label for="urse" title="user name">用户名：</label>
		    <input type="text" id="urse" name="ursename" placeholder="邮箱/手机号/用户名"/><br/>
		    <label for="password">密　码：</label>
		    <input type="password" id="password" name="pass" placeholder="请输入密码" /><br/>
		    <input type="submit" value="提交信息">
		    <input type="reset" value="重置信息">
		</form>

		<form method="post" action="http://www.baidu.com">
	    	 选择一个文件: <input type="file" name="img" accept="image/*,audio/*,video/*"><br/>
	    	<input type="submit" value="提交">
		</form>

		<form method="post" action="http://www.baidu.com">
		    <label>Email: </label>
		    <input type="email" name="usre">
		    <label>电话号码: </label>
		    <input type="tel" name="mobile">
		    <label>选择你喜欢的颜色: </label>
		    <input type="color" name="likecol">
		    <label>查查看:  </label>
		    <input type="search" name="lookup">
		    <label>添加你的主页:  </label>
		    <input type="url" name="homepage">
		    <label>数量 ( 1 到 5 之间): </label>
		    <input type="number" name="num" min="1" max="5">
		    <label>选择日期: </label>
		    <input type="date" name="date">
		    <input type="submit" value="提交">
		</form>

		<form method="post" action="http://www.baidu.com">
		    <fieldset>
		        <legend>个人信息:</legend>
		        姓名: <input type="text"><br/>
		        籍贯: <input type="text"><br/>
		        邮箱: <input type="email"><br/>
		        家庭住址: <input type="text">
		    </fieldset>
		</form>

		<form method="post" action="http://www.baidu.com">
		    <input list="browser" name="explorer" autofocus>
		    <datalist id="browser">
		        <option value="IE">
		        <option value="Firefox">
		        <option value="Chrome">
		        <option value="Safari">
		        <option value="Opera">
		    </datalist>
		    <input type="submit">
		</form>
	</body>
</html>